Dormitories

The Gryffindor dormitories are also located in the Tower, with two doors leading off from the common room that open to spiral staircases. One of them leads to the girls dormitory, the other to the boys. The stairs to the girls dormitories are enchanted to become a slide if any boy attempts to climb them, but not vice versa, since it was deemed that girls were more trustworthy than boys, and Hermione Granger went into the boys' room on several occasions.

The charm used to make the Girls' Dormitory stairs into a slide may be the Glisseo charm. It is never stated if similar enchantments are placed on the entrances to the Girls' Domitories in other houses, but is highly likely, as Hermione identifies the Founders collectively as the ones responsible for the charm.

The Chamber of Secrets video game is also the only place in the games or the films where the common room is accessed by crawling through an actual hole (albeit a square-shaped one). All other adaptations depict a doorway.